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interface ID (was Re: "professional" in an IETF context)

Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp> Tue, 02 November 2021 17:05 UTC

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Date: Wed, 03 Nov 2021 02:05:01 +0900
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Subject: interface ID (was Re: "professional" in an IETF context)
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To: Vasilenko Eduard <vasilenko.eduard@huawei.com>, "ietf@ietf.org" <ietf@ietf.org>
References: <8F4B97EA-665F-4A59-B99D-791B4AB9F2F7@yahoo.co.uk> <746C1453-FFB0-46E5-ABF2-8630DC23B959@network-heretics.com> <c3e9fe1b-8e48-a364-9e25-4084dac70889@meetinghouse.net> <3a6bf8ad-5492-0942-a451-6317e8a93705@network-heretics.com> <3e685576-a230-a7c4-f371-d66a55aa820d@necom830.hpcl.titech.ac.jp> <7a087707-499f-e3bf-8701-1a58930a8a22@meetinghouse.net> <4ec32d7a-a17b-635b-91bc-4152313d6800@necom830.hpcl.titech.ac.jp> <885e62bf-7d6a-4501-a48a-e7c2cbf20382@joelhalpern.com> <e59adb61-a55c-7f5f-a60a-40bf186c139d@necom830.hpcl.titech.ac.jp> <CAC8QAceMSrfkqGTYcMNr3JargO3gxJqTaEyf02LGHd-KVeUDHw@mail.gmail.com> <6286da3e-2beb-9556-089a-2e1951573b1e@gmail.com> <59c80b60-438f-b10f-ad61-ba839f6e4f95@necom830.hpcl.titech.ac.jp> <e834916e85ea47ef94fce07c23928d2b@huawei.com>
From: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
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As I wrote:

 > As I already pointed out in the past here, having "interface
 > identifier" is a feature inherited from XNS having running code.
 >
 > But, that XNS and IPv6 have running code dose not mean they are
 > good.

On 2021/11/03 1:45, Vasilenko Eduard wrote:

> +1. It was a big mistake to break OSI model and include L2 address
> (MAC) inside L3 address (IPv6). Half of the address bits were
> wasted. Many people are coming and coming asking that they would like
> too to get some bits of IPv6 address for some new protocol. Eduard

Indeed. Originally, as proposed by IPng directorates, interface ID
was 48bit long. However, as I pointed out that IEEE1394 has 64bit
MAC, it was extended to be 64bit long.

But, I haven't noticed that it is layer violation. Thank you.

						Masataka Ohta

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